Malicious PDF — malware analysis report

Static analysis result for SHA-256 a601960a1bcf7df1…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 13:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c605ac10d68b0e70b0f3498345dbae92 SHA-1: 92c90b2f0221ff8bd72d930b62f563e89fff7311 SHA-256: a601960a1bcf7df1a2bc3c7c49747a9878cea4214122e6a05fccf3470b2ffbf7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/wix?keyword=diagrama+de+flujo+ejemplo PDF link annotation
    • http://siwivelijutore.medianewsonline.com/84045861733.pdfIn PDF document text
    • http://opt05.ru/zutavefitezemifewuwibetummr8d7.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/facebook_videos_hd_quality_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_600abe3a40a3b.pdfIn PDF document text
    • http://belplitka.ru/herramientas_de_word_2013_y_sus_funciones144ty.pdfIn PDF document text
    • http://podipotekoi.ru/army_reserve_retirement_pay_chart_2020srhtk.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/19876364940.pdfIn PDF document text
    • http://mishabelle.ru/58073776036v5068.pdfIn PDF document text
    • http://fokuguxeni.iblogger.org/81467594066.pdfIn PDF document text
    • http://chestlune.online/blade_and_soul_warden_pve_guide604xi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5fe2d965110d5.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/whats_the_5th_harry_potter_book_called.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_6028f87870b6d.pdfIn PDF document text
    • http://santaparker.store/skyrim_se_vampire_hunter_armor_mod5kgpc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60191150debf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/37d4e15a-33f0-4f74-91ce-a8a7c01b8e7b/que_es_la_contabilidad_financiera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b95a6b4-4b58-4add-aea1-7a836c547059/spolszczenie_do_battlefield_4_dubbing_napisy_chomikuj.pdfIn PDF document text
    • http://kizuwopo.epizy.com/xenofibor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb06076f-f9e3-4461-ac68-04867eb43aee/que_es_distribucion_normal.pdfIn PDF document text
    • http://suramakoto.epizy.com/24674090344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3d7e4e-ddd4-4a3e-aab5-4ec9ddb80afd/jopixagasolegekisukil.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 4956 bytes
SHA-256: c8ca49cf5a33d7ddfdb148b6919490ed1e91fd6c824713065519f54e7b653d73
font_01_sfnt_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 10276 bytes
SHA-256: a036333d909871d3adfa9a9a469056ca68eb9eac58e25620a7fdb6fb6b0f8926
font_02_sfnt_off00011ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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